<!doctype html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Bootstrap demo</title>
  <!-- 引入CSS -->
  <link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
  <div class="container pt-3">
    <h1>响应式容器</h1>
    <p>重置浏览器大小查看效果.</p>
  </div>

  <div class="container-sm border">.container-sm</div>
  <div class="container-md mt-3 border">.container-md</div>
  <div class="container-lg mt-3 border">.container-lg</div>
  <div class="container-xl mt-3 border">.container-xl</div>
  <div class="container-xxl mt-3 border">.container-xxl</div>

  <!-- 引入JS -->
  <script src="bootstrap-5.2.3-dist/js/bootstrap.min.js"></script>
</body>

</html>